The CI-O bond distance in CIO(4)^(Θ) is ...

The `CI-O` bond distance in `CIO_(4)^(Θ)` is 144pm What do you conclude about the structure of this ion ?
(b) The `POCI_(3)` molecule has the shape of an irregular tetrahedron with the `P` atom located centrally The `CI-P-CI` angle is found to be `1035^(@)` Give a qualitative explanation for the deviation of this structure from a regular tetrahedron .

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There must be considerable double bond character in the bonds
(b) The Lewis structure for `POCI_(3)` would show some double bond character between `P` and `O` (`P` is allowed to exceed the octet because of the availabbility of 3d orbitals)
The increased `e^(-)` density in the `P=O` bond would make the intrinsic repulsion between the `P=O` bond and a `P-CI` bond greater than between two `(P-CI)` bonds Thus the `CI-P-CI` angle is lowered and the `CI-P=O` angle is raised as compared to regular tetrahedron

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Read the passage given below and answer the question: In the last 10 years much has been learned about the molecular structure of elemental sulfur. It is now known that many different types of rings are sufficiently metastable to exist at room temperature for several days. It is known that at high temperature, the equilibrium composition allows for a variety of rings and chains to exist in comparable concentration, and it is known that at the boiling point and above, the vapor as well as the liquid contains small species with three, four, and five atoms. The sulfur atom has the same number of valence electrons as oxygen. Thus, sulfur atoms S_2 and S_3 have physical and chemical properties analogous to those of oxygen and ozone. S_2 has a ground state of 38 sigma 3s^2 sigma "*"3s^2 sigma 3pz^2 pi 3px^2=pi3py^2 pi"*"3px^1=pi"*"3py^1.S3 , thiozone has a well- known uv spectrum, and has a bent structure, analogous to its isovalent molecules O_3, SO_2 , and S_2O . The chemistry of the two elements, sulphur and oxygen, differs because sulfur has a pronounced tendency for catenation. The most frequently quoted explanation is based on the electron structure of the atom. Sulfur has low-lying unoccupied 3d orbitals, and it is widely believed that the 4s and 3d orbitals of sulfur participate in bonding in a manner similar to the participation of 2s and 2p orbitals in carbon. (source: Meyer, B. (1976). Elemental sulfur. Chemical Reviews, 76(3), 367-388. doi:10. 1021//cr603010003 ) In the following question, a statement of assertion followed by a statement of reason is given. Choose the correct answer out of the choices on the basis of the above passage. Assertion: S2 is paramagnetic in nature Reason: The electrons in pi"*"3px and pi"*"3py orbitals in S_2 are unpaired.

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